Molybdenum disulfide is an important solid lubricant

Overview of molybdenum disulfide

Molybdenum disulfide is an inorganic substance with the chemical formula MoS2, which is the main component of molybdenite. Black solid powder with metallic luster. Molybdenum disulfide is an inorganic substance with the chemical formula MoS2, which is the main component of molybdenum ore. Black solid powder with metallic luster and smooth hand feeling. The specific gravity is 4.8, and the Mohs hardness is 1 to 1.5. The general friction coefficient is 0.05~0.09. The oil absorption value is 1~1.5. Melting point is 1185℃, sublimation at 450℃. In the atmosphere, the temperature starts to oxidize gradually at about 400°C. As the particle size becomes finer, the oxidation temperature gradually decreases, and the oxide is molybdenum trioxide. Insoluble in dilute acid, dilute alkali, solvent, petroleum, synthetic grease. It can be corroded by aqua regia, concentrated sulfuric acid and boiling concentrated hydrochloric acid. Strong chemical and thermal stability. Does not chemically react with general metal surfaces and does not corrode rubber materials.

Molybdenum disulfide is an important solid lubricant and is known as the "king of solid lubrication".

Molybdenum disulfide is a solid powder made from natural molybdenum concentrate after chemical purification. The color of the product is black, slightly silver-gray, with metallic luster, smooth to the hand, and insoluble in water. Molybdenum disulfide has the advantages of good dispersibility and non-sticking. It is added to various greases to form a non-sticky colloidal state and increase the lubricity and extreme pressure of the grease.

Molybdenum disulfide is also suitable for high-temperature, high-pressure, high-speed, and high-load mechanical conditions to extend the life of the equipment; the main function of molybdenum disulfide for friction materials is to reduce friction at low temperatures and increase friction at high temperatures, resulting in a small loss on ignition .

Molybdenum disulfide (MoS2) as a good solid lubricant has a wide range of applications and is suitable for the following working conditions:

1. Lubrication under wide temperature conditions: the applicable range of lubricating oil and grease is about 60°C to 350°C. Molybdenum disulfide solid lubricant can be applied to the working temperature range of 270°C to 1000°C.

2. Lubrication under heavy load conditions: Generally, the oil film of lubricating oil and grease can only bear a small load. Once the load exceeds the limit value it can bear, the oil film will break and the friction surface will get stuck. The average load that the solid lubricating film can bear is 108Pa.

3. Lubrication under vacuum conditions: Under high vacuum conditions, general lubricating oils and greases are highly evaporative, which can easily damage the vacuum environment and affect the performance of other parts. Generally, molybdenum disulfide solid lubricating materials are used for lubrication.

4. Lubrication under radiation conditions: Under radiation conditions, general liquid lubricants will polymerize or decompose and lose their lubricating properties. Solid lubricants have better radiation resistance.

5. Lubrication of the conductive sliding surface: The friction of the conductive sliding surface such as the motor brush, the conductive slider, the solar collector ring and the sliding electric contact on the artificial satellite working in a vacuum can be lubricated with carbon graphite or metal composite materials.

6. Harsh environmental conditions: Harsh environmental conditions, such as transportation machinery, engineering machinery, metallurgical steel industry institutions, mining machinery and other transmission components that work in harsh environments such as dust, sand, high temperature and high humidity, can use molybdenum disulfide Solid lubricant for lubrication.

7. Corrosive environment: such as ship machinery, chemical machinery and other transmission parts working in corrosive media such as water (steam), sea water, acid, alkali, salt, etc., must withstand different degrees of chemical corrosion. In this case, the transmission parts can be lubricated with molybdenum disulfide solid.

8. The environment is very clean: transmission parts in electronics, textiles, food, medicine, papermaking, printing and other machinery need to avoid contamination and can be lubricated with molybdenum disulfide solid lubricants.

9. Occasions without maintenance: Some transmission components do not require maintenance, and some transmission components need to reduce maintenance frequency in order to save costs. In these occasions, the use of molybdenum disulfide solid lubricants is reasonable and convenient, and can save money.

Application of molybdenum disulfide

Molybdenum disulfide is an important solid lubricant, especially suitable for high temperature and high pressure. It is also diamagnetic, can be used as a linear photoconductor and a semiconductor showing P-type or N-type conductivity, and has a rectifying and energy function. Molybdenum disulfide can also be used as a catalyst for the dehydrogenation of complex hydrocarbons.

Also known as "the king of advanced solid lubricants." Molybdenum disulfide is a solid powder made from natural molybdenum concentrate through chemical purification and changing the molecular structure. This product is black, slightly silver-gray, metallic luster, smooth to the touch, insoluble in water. This product has the advantages of good dispersibility and non-stickiness. It can be added to various greases to form a non-stick gel state, which can increase the lubricity and extreme pressure of the grease. It is also suitable for high-temperature, high-pressure, high-speed, and high-load mechanical working conditions to extend the life of the equipment. The main function of molybdenum disulfide in friction materials is to reduce friction at low temperatures and increase friction at high temperatures, resulting in a small loss on ignition. It is volatile in friction materials.

Anti-friction property: Molybdenum disulfide particle size 325-2500 mesh treated by supersonic jet pulverization, particle hardness 1-1.5, friction coefficient 0.05-0.1, can reduce friction when used in friction materials;

Increase friction: Molybdenum disulfide is not conductive. There are copolymers of molybdenum disulfide, molybdenum trisulfide and molybdenum trioxide. When the friction material rises sharply due to friction, the molybdenum trioxide particles in the copolymer expand with the increase in temperature to increase the friction;

Anti-oxidation: Molybdenum disulfide is prepared by chemical purification and comprehensive reaction. Its PH value is 7-8, which is slightly alkaline. It covers the surface of the friction material to protect other materials and prevent them from being oxidized, especially to prevent other materials from falling off and enhance adhesion;

In addition, molybdenum disulfide can also become a new material for making transistors. Compared with graphene, which is also a two-dimensional material, the energy band gap of molybdenum disulfide is 1.8 eV, while graphene has no energy band gap. Therefore, molybdenum disulfide may have a broad application space in the field of nano-transistors. Moreover, the electron mobility of a single-layer molybdenum disulfide transistor can reach about 500 cm^2/(V•s), and the current switching rate can reach 1×10^8.

Molybdenum disulfide price

The price of molybdenum disulfide varies randomly with factors such as production costs, transportation costs, international conditions, exchange rates, and supply and demand in the molybdenum disulfide market. Tanki New Materials Co.,Ltd. aims to help various industries and chemical wholesalers find high-quality, low-cost nanomaterials and chemicals by providing a full set of customized services. If you are looking for molybdenum disulfide materials, please feel free to contact to get the latest price of molybdenum disulfide.

Suppliers of Molybdenum Disulfide

As a global supplier of molybdenum disulfide, Tanki New Materials Co.,Ltd. has extensive experience in the performance, application and cost-effective manufacturing of advanced engineering materials. The company has successfully developed

Series of powder materials (zinc sulfide, tungsten sulfide, bismuth sulfide, etc.), high-purity targets, functional ceramics and structural devices, and provide OEM services.